Telephone hook-switch.



E0. 843,998. E PATENTED FEB. 12, 1907. 0.0.GADDEN.

TELEPHONE HOOK SWITCH APPLICATION FILED MAR.15,1905.

Mrzvtwfis, //v v/v TOR; Charla: C. C F4 811 THE NORRIS PETERS ca, WASHINGTON, nc.

UNITED @JTATES rarnnr orrien.

TELEPHONE HOOK=$WlTCHn Specification of Letters Patent.

Patented Feb. 12, 1907.

Application filed March 15, 1905. Eerial No. 250,233.

T0 at whom it may concern.- Be it known that I, CHARLES citizen of the United States of America, and a resident of Cleveland, in the county of Guyahoga and State of Ohio, have invented certain new and useful Improvements in Tele phone Hook-Switch, of which the following is a specification, reference being had to the accompanying drawings, which form a part thereof.

My invention relates to electric switches, and more particularly to telephone switchhooks employed at the subscribers stations.

ts objects are to improve, simplify, and cheapen the construction of such switches;

and it consists of such improvements in the details of construction and relative assemblage of the parts as will hereinafter be fully described and claimed. Certain features herein set forth, however, are specifically claimed by Herbert L. Knight in his application, Serial No. 250,232, filed of even date herewith.

The accompanying drawings provements in such detailed semblage of p rts as is now deemed most desirable by me; but changes not requiring the exercise of invention might be made therein by a skilful mechanic w' hout departure from the spirit of my invention as set forth in the claims at the end of this specification. In the drawings, Figure 1 is a side elevation, partly in section, of my improved switch mechanism as applied to a telephonesubscribers station-box, preferably a metallic box. Fig. 2 is a similar view, partly in section, on the line 2 2 of Fig. 3, with. the pivotal portion of the main operating-lever shown in a different position from that of Fig. 1 and partly broken away. Fig. 3 is a plan view of the parts shown in Fig. 2, but in the positions of Fig. 1. Fig. i is similar view with the main portion of the actuating lever removed and the parts in section on the line 4 4 of Fig. 2. Fig. 5 is a view in elevation of the pivotal end of the removable main portion of the actuating-lever. Fig. 6 is a side elevation of the insulating-base, the pivot-standard, the secondary portion of the actuating-lever, and its spring. Fig. 7 is a plan view of the pivot-standard and the secondary portion of the actuating-lever mounted thereon.

The same character of reference is employed throughout the several figures to indicate similar parts.

show my imforms and as- My electric switch mechanism is a com- C. CADDEN, a plete unit of itself and may be applied in any desired way. In the drawings 1 have shown it as mounted in a box A, adapted for use at a telephone-subscribers station. For this purpose the operating-lever B is provided at its end, projecting from the box, with prongs 6, upon which to hang a telephone-receiver. The box A may be of any suitable materialwood or metal-but I prefer to make it of thin metal, as shown.

A block F of non-conducting material constitutes the base of my device, and at its side is a standard I), secured in place by a screw d and dowel-pins d. Near the top of the standard is a projecting stud-pin E, which serves as a pivot for the operating-lever B, and at its upper corner farthest from the stud-pin is an overhanging lug (1 which serves as a stop to limit the movement of the operating-lever.

The operating-lever is made in two parts B and C, the former having the projecting forked end before referred to removable from the pivot El, while the latter is perma nently mounted on the pivot and is provided with means whereby it may be connected to the removable portion of the lever. The pivot-pin E has a threaded portion 6, which screws into the standard, and a larger shouldered portion a, upon which is mounted the permanent portion C of the lever, and a still removable portion B of the lever and in which larger portion 0 upon which is mounted the is formed an annular groove 6.

The pivotal end of the removable portion B of the lever is slotted, as at b, and in this slot is a thin latch b, pivoted on a pin 6 and provided with a slot b, which engages the pivot-pin E at the groove 6 as'will be readily understood. The latch is provided with a projection b, which serves as a handle for operating it.

The permanent portion C of the lever extends forwardly from the pivot E and is preferably U shaped to secure lightness. Its uper arm 0 lies beneath the lug d of the standard, and it is provided with a side projecting lug c, which engages a slot If in the other member of the lever to insure unison of movement therewith. The lower arm 0 of this ortion of the lever extends considerably in advance of the upper arm and carries a side projecting screw-stud 0 on which is a nonconductive sleeve 0 On the base F is mounted a strong fiat spring G. the free end of which is curved back toward the base and engages the upper arm 0 of the lever C, as shown, tending to hold the lever in its normal raised position. Upon the heel of this spring is imposed a series of blocks II of insulating material, and between these blocks are secured the heel ends of contact-springs or switch-arms J, J, J and J which, together with the blocks and the main spring G, are secured to the base by screws h, surrounded by sleeves 72,, of insulating material. Projections y', j, j and j from the heel ends of these switch-arms are apertured, as shown, to afford ready means for making conducting-wire connections.

The switch-arms normally extend horizontally and out of contact except as they may be sprung by the switch-arm J. This arm is longer than the others, is bifurcated at its free end, and has one of its forks bent up, as shown at j, so that the stud-pin c of the lever portion C lies between the two rongs and actuates the arm J in unison wit the lever. The number of these spring switch-arms and the manner of connecting them in circuit may be varied as desired in the use to which my invention may be put.

As previously stated, I have shown it as adapted for use at a telephone-subscribers station, and in this adaptation the springarms J and J, which are normally in contact, as shown in Fig. 2, when the receiver is on the hook, might be included in the signalingcircuit of the telephone system, while the arms J and J which are only in contact when the receiver is ofl the hook and the lever raised, as shown in Fig. 1, might be included in the talking-circuit I claim- 1. In an electric switch mechanism, the combination of an insulating-base, a standard secured thereto, a U-shaped spring and a series of insulated spring switch-fingers secured upon the top of the base by the same means, a lever pivoted on the standard and engaged by the free end of the U-shaped spring, the lever lying out of the plane of the switch-fingers and having an insulated pin which extends into said plane and engages one of said fingers, substantially as set forth.

2. In an electric switch mechanism, the combination of an insulating-base, a series of insulated switch-fingers imposed on the base, a standard secured to the base and a pivotpin projecting from standard above the heel ends of the switch-fingers, a lever pivoted on said pin extending in the direction of the free ends of said fingers and having a lower member also extending in said direction but out of the plane of the switch-fingers, an insulated pin on said member extending into the plane of and adaptedto engage and operate the switch-fingers, and a U-shaped spring secured on the base its free end bowing around the free ends of the switch-fingers and the lower member of the lever and engaging the main portion of the lever near the standard, substantially as set forth.

3. In an electric switch mechanism. the combination of an insulated base, a series of insulated spring switch-fingers imposed on said base, a standard secured to one side of the base, a lever ivoted on said standard out of the plane or said switch-fingers, with an insulated pin on said lever extending into the plane of said switch-fingers one of which is bifurcated at its free end and engages the said insulated pin between its forks substantiall'y as set forth. I

Signed at Cleveland, this 11th day of March, 1905, in the presence of two subscribing witnesses.

CHARLES C. CADDEN. Witnesses:

HERBERT L. KNIGHT, ALBERT LYNN LAWRENCE. 

